Welcome 微信登录

首页 / 脚本样式 / JavaScript / nodejs 中模拟实现 emmiter 自定义事件

nodejs 中模拟实现 emmiter 自定义事件
<!DOCTYPE html><html> <head><meta charset="UTF-8"><title></title><script> function Emitter() {this.events = {}; //存放事件的地方 } Emitter.prototype.on = function(type, cb) {var events = this.events; events = events[type] = events[type] || [];events.push(cb); };Emitter.prototype.emit = function(type) {var args = [].slice.call(arguments, 1);var cbs = this.events[type], cb;while (cb = cbs && cbs.shift()) { cb.apply(this, args);} }; var emitter = new Emitter(); emitter.on("customevent", function(param) {alert(param); }); emitter.on("customevent", function() {alert(1); }); emitter.emit("customevent", "xxx");</script> </head> <body> </body></html>